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Old 24th March 2013, 14:38
wck wck is offline
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Default [Solved] smtp sasl authentication failure, no explanation


Running ISPconfig 3 on Ubuntu Server 12.04 LTS (Perfect server guide Howto)
ISPconfig is up to date and I allowed it to reconfigure services.

I cannot send emails through my server. After trying to connect via Gmail, the logs show :

Mar 24 13:14:07 servername postfix/submission/smtpd[16901]: connect from mail-ie0-f178.google.com[]
Mar 24 13:14:07 servername dovecot: auth-worker: mysql(localhost): Connected to database dbispconfig
Mar 24 13:14:09 servername postfix/submission/smtpd[16901]: warning: mail-ie0-f178.google.com[]: SASL PLAIN authentication failed: 
Mar 24 13:14:09 servername postfix/submission/smtpd[16901]: disconnect from mail-ie0-f178.google.com[]
After a lot of Googling I see there is generally an explanation after "authentification failed: " but here, there is none.

Something else I've tried to check saslauthd :

testsaslauthd -u user@domain.com -p password -s smtp
0: NO "authentication failed"
Any help would be greatly appreciated.

Last edited by wck; 24th March 2013 at 17:48.
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Old 24th March 2013, 17:47
wck wck is offline
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Well... problem solved.

Most tutorials about this problem mention smtpd.conf (which didn't exist on my server...) but the authentication code is actually in /etc/dovecot/dovecot-sql.conf

In this file, the SQL query has an extra "AND disable%Ls = 'n'" compared to what's usually in smtpd.conf and I realized `disablesmtp` was set to 'y' for the account I was trying to use (in dbispconfig.mail_user).

So, two solutions :
- manually set `disablesmtp` to 'n'
- check "enable receiving" in the settings for this email mailbox (although I'm using it purely to send email, not receiving).

testsaslauthd still tells me "authentication failed"... but eh, it works.

Last edited by wck; 24th March 2013 at 17:51.
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dovecot, saslauthd, smtp

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